Created
February 14, 2012 09:54
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MapReduce.sh
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#!/bin/bash | |
LANG=C | |
LC_ALL=C | |
set -e | |
abs_path=$(cd $(dirname $0) && pwd) | |
input_dir=${input_dir:-${abs_path}/input.d} | |
output_dir=${output_dir:-${abs_path}/output.d} | |
dist_id=${dist_id:-1} | |
dist_num=${dist_num:-1} | |
[ -d ${input_dir} ] || { | |
echo no such directory: ${input_dir} >&2 | |
exit 1 | |
} | |
[ -d ${output_dir} ] || mkdir -p ${output_dir} | |
function list_file() { | |
ls ${input_dir} | egrep '.txt$' | |
} | |
total=$(list_file | wc -l) | |
cat <<EOS | |
total:${total} | |
dist_num:${dist_num} | |
---- | |
EOS | |
range=$((${total} / ${dist_num})) | |
from= | |
to= | |
cur=0 | |
limit=$((${dist_num} - 1)) | |
while [ ${cur} -le ${limit} ]; do | |
if [ ${cur} = $((${dist_id} - 1)) ]; then | |
#echo -n "${cur}: " | |
case ${cur} in | |
${limit}) | |
from=$((${range} * ${cur} + 1)) | |
to=${total} | |
;; | |
*) | |
from=$((${range} * ${cur} + 1)) | |
to=$((${range} * $((${cur}+1)))) | |
;; | |
esac | |
echo "[${cur}]: ${from} - ${to}" | |
fi | |
cur=$((${cur} + 1)) | |
done | |
list_file | sed -n -e "${from},${to}p" | while read text_file; do | |
echo ... ${text_file} >&2 | |
${abs_path}/mapper.sh < ${input_dir}/${text_file} | ${abs_path}/reducer.sh | |
done | ${abs_path}/merger.sh > ${output_dir}/result.idx |
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#!/bin/bash | |
LANG=C | |
LC_ALL=C | |
set -e | |
abs_path=$(cd $(dirname $0) && pwd) | |
input_dir=${input_dir:-${abs_path}/input.d} | |
output_dir=${output_dir:-${abs_path}/output.d} | |
[ -d ${input_dir} ] || { | |
echo no such directory: ${input_dir} >&2 | |
exit 1 | |
} | |
[ -d ${output_dir} ] || mkdir -p ${output_dir} | |
function list_file() { | |
ls ${input_dir} | egrep '.txt$' | |
} | |
total=$(list_file | wc -l) | |
cat <<EOS | |
total:${total} | |
---- | |
EOS | |
list_file | while read text_file; do | |
echo ... ${text_file} >&2 | |
${abs_path}/mapper.sh < ${input_dir}/${text_file} | ${abs_path}/reducer.sh | |
done | ${abs_path}/merger.sh > ${output_dir}/result.idx |
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all: prepare | |
prepare: RFC-all.tar.gz rfc/rfc1.txt | |
rfc/rfc1.txt: | |
[ -d rfc ] || mkdir rfc | |
cd rfc && tar zxvf ../RFC-all.tar.gz | |
RFC-all.tar.gz: | |
curl --ftp-pasv ftp://ftp.rfc-editor.org/in-notes/tar/RFC-all.tar.gz -o $@ |
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#!/bin/bash | |
LANG=C | |
LC_ALL=C | |
cat \ | |
| tr -c '[:alnum:]' '[\n*]' \ | |
| grep -v '^[0-9]*$' |
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#!/bin/bash | |
LANG=C | |
LC_ALL=C | |
cat \ | |
| awk ' | |
{ | |
if (word_map[$2] == 0) { | |
word_map[$2] = $1 | |
} | |
else { | |
word_map[$2] += $1 | |
} | |
} | |
END { | |
for (k in word_map) { | |
print word_map[k], k | |
} | |
} | |
' \ | |
| sort -nr |
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#!/bin/bash | |
LANG=C | |
LC_ALL=C | |
cat \ | |
| sort \ | |
| uniq -c \ | |
| sort -nr |
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